Hi, Below is a question on white box testing. Kindly help
me in answering it. How many test cases are needed to
obtain 100% branch coverage. This question was asked in
ISTQB foudation level exam - Dec21 2008.
Read(A,C)
If(A<10) then Print A;
Endif
If(C>100) then Print C is greater then A
else if(C<100) then print only C
Endif else
Options -
a. 4
b. 3
c. 2
d. 1
Kindly answer with explanation so that it would be easy to
understand
- 6 Answers
- 6745 Views
- ISTQB, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rama mohan parini
Require 3 Path test cases.
Test Case 1 - A is any value > 9 and C = 100 to check that
nothing is printed.
Test Case 2 - A is any value < 10 and C is > 100 to check
that Print A and
Print C is greater than A lines are printed
Test Case 3 - A is any value, and C is < 100 to check that
Print A ( only if A is < 10)
Print C is greater than A is printed.
We should use Cyclomatic complexity formula to calculate
number of paths easily
C = E - N + 2
| Is This Answer Correct ? | 4 Yes | 2 No |
Answer / hima bindu
Number of testcases required for branch coverage will be 2.
In branch coverage we need to check whether all the
branches are exercised.
Here we have 3 branches all If statements we need to
consider.They are A<10,C>100,C<100
Line 1 - Read(A,C)
Line 2 - If(A<10) then
Line 3 - Print A;
Line 4 - Endif
Line 5 - If(C>100)then
Line 6 - Print C is greater then A
Line 7 - else if(C<100) then
Line 8 - print C
Line 9 - End if
So take the values as follows
Testcase 1 : A=5 and C=120
For this set of values Line1 - Line6 are executed
Now for the Line7 - Line9 to be executed take the value of
c as less than 100
So Testcase 2 : A=5(can be any value as Line 2,3,4 are
already exercised in testcase1)and c=80
For this set of values Line7-Line9 will be exercised
| Is This Answer Correct ? | 2 Yes | 2 No |
Answer / madhu
3 cases would be required
as we need to exercise both positive and negative scenarios
of the 2 branches
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / kajal
answer is a.4
1 test case to check if system can read a and c
2 to check if a<10
3 to check if c is > 100 and < 100
to check if a and c are printed
| Is This Answer Correct ? | 2 Yes | 5 No |
Answer / varshab
Ans is 4 as there are two branches.For these two branches
we need to test for both true & false conditions. hence to
achieve 100% branch coverage we need to write 4 test cases.
| Is This Answer Correct ? | 0 Yes | 3 No |
how do u do smoke test for login page which has username , password, ok, and cancel buttons
1.what is the purpose of testing ?
1> Which is the latest technology use for login page? 2> What is virtual keyboard? Is it more secure than key board?
What is lessons learnt document?Explain.
What is Data Flow Testing?
What test metrics do you provide to your client?
what ways u followed for defect management
what is difference between waterfall model and vmofel?
what type of report that you print it out from your defect tracking too when you go for the bug triage meetings? Thanks
3. How would u test and automate Windows Auto-Update featur
what is configuration management...please explain... thanx
What are all the responsibilities will be having for a tester who is having 1+yrs of experience? What are the things the concern may expect for their recruitment process?
Automation Testing 
